I don't see the popup for letting me install this extension after I only installed Ranorex Agent 6.0.1 on the computer(No ranorexstudio etc. only the agent). I tried to google this extension and I cannot find it.

If Ranorex is already installed, or you just installed it, then you can run the Instrumentation Wizard from the Start Menu or from inside Ranorex Studio.

Note: There is currently a bug, which has been confirmed by the Ranorex team, with Ranorex Remote Agent where it will not ask you to install the Ranorex Run-time environment if Ranorex has already been installed and then uninstalled on the system. In this case the work-around is the same as above, namely to install Ranorex manually and then instrument as needed.

You don't have to install entire Ranorex Studio, just copy the Ranorex-FF-New.xpi file from an existing Ranorex installation, and drag&drop it to Firefox on target machine. This should initiate FF extension installation. Eventually, follow the steps described here...http://www.ranorex.com/forum/problem-fi ... tml#p34764

Alright, I have copied Ranorex-FF-New.xpi to the machine I just installed Ranorex Agent.
The drag and drop of the file to the opened firefox doesn't work. I just use Firefox open that file, then it pops up the window which you can install the extension.